Ok so I don't have the house number (3 digits) screwed up anywhere on my front door but ...after a few times of the post man putting next doors post through my door and me being in when this happens, I open the door and give it back to him and say this is for next door.
I've come home today so see my house number written in black marker pen on my white uPVC door. Not huge but still obvious!
Both my neighbours have their numbers on their doors so surely it's not that difficult to work out my number?
Must add .. Where I live you don't go in the front door often... We park at the back and come through the back garden. I do have my house number on my back gate so a number on the front would only be needed for a postman as all other deliveries etc come to the back.